Lighting fixture



May 27, 1941. M. s. WIDEROE LIGHTING FIXTURE Filed June 27, 1938 2 Sheets-Sheet l y 1941- M. s. WIDEROE 2,243,270

LIGHTING FIXTURE Filed 'June 27, 1938 v 2 Sheets-Sheet 2 Patented May 27, 1941 LIGHTING FIXTURE Marshall S. Wideroe, Northbrcok, 111., assignor to Benjamin Electric Mfg. Company, Des Plaines, 111., a corporation of Illinois Application June '27, 1938, Serial No. 215,966

Claims.

This invention relates to a lighting fixture, and more particularly to a dust-proof lighting fixture.

Various types of lighting fixtures have been proposed in the past which have in combination therewith a transparent bowl arranged with the reflector or canopy of the fixt re in such a manner that dust may be excluded from the inner portions of the fixture. These have not been entirely satisfactory, however, since the bowl portion is generally difiicult to remove when relamping or servicing becomes necessary, particularly when the fixture is attached to ceilings and other more or less inaccessible places.

One of the objects of this invention is to provide a lighting fixture having improved means whereby a light-transmitting bowl may be easily and quickly attached and detached with respect to the supporting canopy to provide access to the interior of the fixture for re-lamping, cleaning, and servicing.

A further object of this invention is to provide a fixture having improved means whereby the light-transmitting bowl may be suspended from the canopy when moved to inoperative position.

A further object of this invention is to provide such a construction in which the fixture is provided with an inverted dished reflector within the canopy.

Further and additional objects of this invention will appear from the following description and the appended claims.

Referring now to the drawings:

Figure 1 is an axial sectional view of a lighting fixture constructed in accordance with this invention;

Fig. 2 is a fragmentary axial sectional View of the lighting fixture showing the means whereby the bowl is suspended from the canopy; and

Fig. 3 is a side elevational view showing the hinge construction with the reflector removed from the canopy.

According to one embodiment of this invention, the lighting fixture comprises a canopy It, a bowl portion [5, and a dished reflector 2| which is secured by a suitable means within the canopy. The bowl portion of the fixture may be secured by a flanged ring which is cut in such a manner that it may be attached to the canopy separately from the reflector by means of a plurality of suitable bayonet joints. The bowl portion may be hinged directly to the canopy by means of a suitable loop 32 which serves to suspend the bowl, when in a detached position, directly from the canopy and independently of the reflector. The canopy l9, reflector 2|, and bowl 15 are so arranged that the bowl may be readily detached in order to remove the bulbs from the fixture.

Referring now more particularly to the drawings, a suitable canopy I0 is provided, within the base of which is attached a supporting cup I l by screws or rivets 12. On the inner. portion of the outwardly extending edges of the canopy, a felt gasket I3 is provided. which contacts with a metal ring [4 secured on the edges of a lighttransmitting bowl 15. The canopy l0 bears a plurality of downwardly extending straps i6 fastened by means of rivets H to the inside edges of the canopy l0 adjacent the outer peripheral portion. Each strap 16 has an inwardly extending portion i8 and an outwardly extending portion 19, the inwardly extending portion l8 having a threaded hole into which a screw 26 may be threaded in order to hold the dish-shaped metal reflector 2! in place. Consequently, the reflector 21 has a diameter somewhat less than the outer peripheral edges of the canopy ill. The outwardly extending portions IQ of the strapslfi are positioned to engage cut-out portions 22 of the flange 23 of the ring M on the edge of the bowl l5'in order toprovide a bayonet joint connection with the ring I4.

The ring [4 is secured to the inside edges of the bowl I5 by means of suitable clips 24, each of which is locked in place by a screw 25, a threaded nut or plate 26, and a lock washer 21. A pad 28 is provided at the contact between the strap 24 and the bowl portion E5 to protect the bowl from chipping or breaking when the flanged ring I4 is firmly secured to the bowl. The ring securing straps 24 are spaced around the bowl in any desired number, and three will usually be found sufficient to secure the ring l4 in place.

The flange 23 of the ring I4 is notched or out out at suitable intervals, said notches 22 being positioned to receive the outwardly extending portions I9 of the straps l6 attached to the canopy ID. The flange 23 has upwardly and downwardly extending lips 29 and 36, respectively, which permit the outwardly extending portion H] of the strap I6 to be more readily guided under the flange 23 when the bowl portion I5 is placed adjacent the canopy portion In and twisted in the proper direction. A bayonet type joint is thus provided. The upwardly extending lip 29 which receives the outwardly extending portion l9 when the bowl I5 is tightened onto the canopy I0 is slightly deformed near its base 3! in order that the strap [6 and its outwardly extending portion H! be locked into position when the bowl is in place. It will be observed that the bowl I5 may thus be readily detached from the canopy by a. twisting motion by virtue of the bayonet joint produced by the outwardly extending portions IQ of the strap [6 attached to the canopy l0 and the corresponding portions 22 cut out from the flange 23 of the ring I4 secured to the bowl l5.

It will be further observed that, when the bowl is attached and locked in place, the ring compresses against the felt gasket l3, which may be cemented or otherwise securely fixed to the canopy II]. In order to provide a suitable suspension construction for the bowl with respect to the canopy, a wire loop 32 may be used, both ends of which may be secured to brackets 33 which are securely fastened to the flange 23 of the ring [4 on the bowl [5. When the bowl is in suspended position as in Fig. 2, the looped end 34 of the Wire 32 passes over the inwardly extending portion iii of the strap l6 attached to the canopy l0 and lies between the main body of the strap l6 and the bolt 20 employed for securing the reflector 2| to the strap I6. The wire 32 is pivotally secured to the brackets 33 so that it is freely movable in a plane corresponding to the long axis of the reflector. When the bowl portion I is moved toward the canopy M, the wire 32 slides up into the space between the reflector 2| and the canopy i0 and pivots on the brackets 33 in order to fit within the space.

It will be observed that the brackets 33 to which the wire 32 is attached are spaced apart and so arranged that the bowl portion and the canopy may be joined by rotating each with rereadily pass through the space between the strap l6 and the reflector 2|.

The reflector 2| contains a suitable hole 35 in the center through which the elongated portion 36 of a bulb 31 may be readily inserted and screwed into the socket 38 that is employed in connection with the lighting fixture. The socket 38 is attached to a suitable strap or plate 39 by means of screws 40. It is separate from the lighting fixture itself and passes through hole 40a in the supporting plate I l The lighting fixture is attached to the strap 39 by means of suitable screws 4| inserted through the supporting cup H and into threaded portions of the strap. Wires (not shown) may be introduced to the light socket 38 in any desired manner. sired, an auxiliary socket 42 may be attached to the reflector portion 2| of the lighting fixture by means of suitable screws 43 and screw plates 44. In order to provide an auxiliary light source 44a, wires (not shown) leading to the auxiliary socket 42 may be run between the canopy l0 and the reflector 2| from the main light socket 38, if desired.

It will be observed from the above description that the lightin fixture of this invention is substantially dust-proof, and the bowl may be readily disconnected from the canopy by merely twisting it in relation to the canopy. The bowl portion then swings free and clear of the canopy and reflector and permits ready re-lamping and servicing of the lighting fixture.

-While a particular embodiment of this invention is shown above, it will be understood, of course, that the invention is not to be limited thereto, since many modifications may be made,

and it is contemplated, therefore, to cover any such modifications as fall within the true spirit and scope of this invention as defined by the appended claims.

I claim:

1. A lighting fixture comprising a metal canopy, an inverted dished reflector in said canopy, a light-transmitting bowl, and means for mounting said light-transmitting bowl underneath said reflector comprising a metal ring secured to the upper edge of said light-transmitting bowl and having an inwardly-extending flange having a plurality of circumferentially-spaced notches therein, a plurality of circumferentially-spaced brackets secured to said canopy and extending downwardly therefrom the reflector being suspended from said brackets and maintained in fixed spaced relationship to said canopy, said brackets each having an outturned terminal portion for disengageable cooperation with the circumferentially spaced notches in the bowl supporting flange, said bowl having a reduced neck portion and said metal ring lying mainly inside said reduced neck portion.

2. A lighting fixture comprising a metal canopy, an inverted dished reflector in said canopy, a light-transmitting bowl, and means for mounting said light-transmitting bowl underneath said reflector comprising a metal ring secured to the upper edge of said light-transmitting bowl and having an inwardly-extending flange having a plurality of circumferentially-spaced notches therein, a plurality of circumferentially-spaced brackets secured to said canopy and extending downwardly therefrom and having outwardly-extending lugs co-operating with said notches to form a bayonet joint connection between said light-transmittin bowl and canopy, said fixture having means for holding the light-transmitting bowl suspended from the canopy when the bayonet joint is disconnected comprising a loop having a hinge connection with said metal ring and straddling one of said brackets.

3. A lighting fixture comprising a metal canopy, an inverted dished reflector in said canopy, a light-transmitting bowl, and means for mounting said light-transmitting bowl underneath said reflector comprising a metal ring secured to the upper edge of said light-transmitting bowl and having an inwardly-extending flange having a plurality of circumferentially-spaced notches therein, a plurality of circumferentially-spaced brackets secured to said canopy and extending downwardly therefrom and having outwardlyextending lugs co-operating with said notches to form a bayonet joint connection between said light-transmitting bowl and canopy, said fixture having means for holding the light-transmitting bowl suspended from the canopy when the bayonet joint is disconnected comprising a link having a hinge connection with said bowl and having a swinging connection with said canopy when the bayonet joint is connected.

4. A lighting fixture comprising a metal canopy, an inverted dished reflector in said canopy, a light-transmitting bowl, and means for mounting said light-transmitting bowl underneath said reflector comprising a metal ring secured to the upper edge of said light-transmitting bowl and having an inwardly-extending flange having a plurality of circumferentially-spaced notches therein, a plurality of circumferentially-spaced brackets secured to said canopy and extending downwardly therefrom and having outwardlyextending lugs .co-operating with said notches to form a bayonet joint connection between said light-transmitting bowl and canopy, said fixture having means for holding the light-transmitting bowl suspended from the canopy when the bayonet joint is disconnected comprising a loop having a hinge connection with said metal ring and straddling one of said'brackets, the upper portion of said loop being moved into the space between the canopy and reflector when the bayonet joint is connected.

5. A lighting fixture comprising a metal canopy, a light-transmitting bowl, and means for mounting said bowl underneath said canopy comprising a bayonet joint connection between said bowl and canopy, said fixture havin link means for holding the bowl suspended from the canopy when the bayonet joint is disconnected, said link means being housed by the canopy when the bayonet joint is connected and extended outside the canopy when the bayonet joint is disconnected and the bowl is suspended, and comprising a loop, the lower ends of which have a hinge connection with the bowl, the upper central portion of the loop having a readily disengageable circumferentially slidable supporting engagement with the canopy.

MARSHALL S. WIDEROE. 

